Orthodontic Assistant Practice Exam 2026 – Complete Prep Guide

The correct placement of a band is below the height of contour. This positioning ensures that the band fits snugly around the tooth while allowing for proper engagement with the orthodontic appliance. Placing the band below the height of contour provides adequate support and stability, making it less likely to loosen during treatment.

The height of contour refers to the greatest bulge on the tooth's surface, which is important for dental anatomy as it influences how dental appliances interact with the teeth. When the band is below this contour, it can effectively capture the tooth anatomy to maintain the intended position throughout treatment.

This strategic placement also helps in avoiding potential issues such as irritation to the gingiva, which can occur if the band is positioned too high or on the contour. Adjustments to fit can be made if necessary, but the general rule is that bands should rest comfortably below the height of contour for ideal orthodontic outcomes.